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비름(Amaranth)과 명아주(Quinoa) 재배종의 기능성 물질과 변이
이재학,김기준,이정일,이승택,류수노,Lee, Jae-Hak,Kim, Ki-Jun,Lee, Jung-Il,Lee, Seung-Tack,Ryu, Su-Noh 한국작물학회 1996 Korean journal of crop science Vol.41 No.S
Amaranth(Amaranthus spp. L.) and quinoa (Chenpodium quinoa Willd.) are old crops from South, Central America and Central Asia and their grains have been identified as very promising food crops because of their exceptional nutritive value. Squalene is an important ingredient in skin cosmetics and computer disc lubricants as well as bioactive materials such as inhibition of fungal and mammalian sterol biosynthesis, antitumor, anticancer, and immunomodulation. Amaranth has a component called squalene (2,6,10,15,19,23-hexamethyl-2,6,10,14,22-tetraco-sahexaene) about 1/300 of the seed and $5\~8\%$ of its seed oil. Oil and squalene content in amaranth seed were different for the species investigated. Squalene content in seed oil also increased by $15.5\%$ due to puffing and from 6.96 to $8.01\%$ by refining and bleaching. Saponin concentrations in quinoa seed ranged 0.01 to $5.6\%$. Saponins are located in the outer layers of quinoa grain. These layers include the perianth, pericarp, a seed coat layer, and a cuticle like structure. Oleanane-type triterpenes saponins are of great interest because of their diverse pharmacological properties, for instance, anti-inflammatory, antibiotic, contraceptive, and cholesterol-lowering effects. It is known that quinoa contains a number of structurally diverse saponins including the aglycones, oleanolic acid, hederagenin, and phytolaccagenic acid, which are new potential in gredient for pharmacological properties. It is likely that these saponin levels will be considerably affected by genetic, agronomic and environmental factors as well as by processing. With the current enhanced public interest in health and nutrition amaranth and quinoa will most likely remain in the immediate future within the realm of exotic health foods until such time as agricultural production meets the quantities and qualify required by industrial food manufacturers.
산부식과 CO<sub>2</sub> 및 Nd:YAG 레이저 조사에 따른 상아질 표면의 변화
이재학,박준상,고명연,Lee, Jae-Hak,Park, June-Sang,Ko, Myung-Yun 대한안면통증구강내과학회 2000 Journal of Oral Medicine and Pain Vol.25 No.1
The purpose of this study was to examine dentin surface changes of extracted sound third molar specimens which were etched with 10% maleic acid and irradiated at $7-140J/cm^2$ with $CO_2$ and at $156-280J/cm^2$ with Nd:YAG laser. The results were as follows. 1. Dentin surfaces etched with 10% maleic acid and then irradiated at below of $42J/cm^2$ with $CO_2$ laser showed the retentive morphology for resin restoration. 2. Dentin surfaces irradiated at below of $42J/cm^2$ with $CO_2$ laser showed the increased acid-resistance. 3. Dentin surfaces irradiated at $218-280J/cm^2$ with Nd:YAG laser showed the retentive morphology. 4. Dentin surfaces irradiated at $218-280J/cm^2$ with Nd:YAG laser and etched 10% maleic acid and then $218-280J/cm^2$ with Nd:YAG laser showed the increased acid-resistance.
대형마트 종사자에 대한 서비스교육, 조직지지 및 중재지원이 감정노동 업무성과에 미치는 영향에 관한 연구
이재학,Lee, Jae-Hak 한국중재학회 2018 중재연구 Vol.28 No.2
The purpose of this study is to investigate the effects of service training and arbitration support on superstore workers' work performance. The conclusion could be summarized as follows. First, as a result of Hypothesis 1 that service training and arbitration support for superstore workers would significantly affect the factor of workers' emotional labor, when surface acting of emotion and frequency of expressing emotions were the dependent variable, only arbitration support was positively correlated. When emotional diversity was the dependent variable, there was a significantly positive relationship with service training. Second, for Hypothesis 2 that service training and arbitration support for superstore workers would significantly influence the workers' job satisfaction, it was found that only organizational support was significantly positive when wage satisfaction was the dependent variable. When job satisfaction was the dependent variable, service training and arbitration support were significantly correlated positively. Third, for Hypothesis 3 that service training and arbitration support for superstore workers would significantly affect the service delivery level when service responsiveness was the dependent variable, service training and arbitration support were significantly positive. When service expertise was the dependent variable, there was also a significantly positive relationship with service training and arbitration. On the other hand, all the three independent variables-service training, organizational support, and arbitration support-showed a significantly positive relationship when the willingness and effort of service was the dependent variable.
이재학,노영재,조양기,Lee, Jae-Hak,Ro, Young-Jae,Cho, Yang-Ki 한국해양학회 2007 바다 Vol.12 No.1
원자력발전소 온배수 영향 조사 과정상 문제점을 평가하고 대안으로서 조사 표준 지침을 제시하였다. 관측이나 온배수 확산 모델링 단독으로 이루어진 지금까지의 방법으로는 시간에 따른 온배수에 의한 수온 분포의 변화를 정량적으로 파악하는데 한계가 있으므로, 관측과 온배수 확산 수치모델링의 상호 보완적인 조사를 병행하는 것이 바람직하다. 현장 관측은 원자력발전소 인근 해역의 모든 자연적 열원의 영향을 고려한 열수지 모형의 개념에 근거한 조사가 중요하며, 수치모델링의 결과를 기준 수온분포로서 활용하고자 할 경우에는 수치모델링에 의한 현상 재현이 통계적 유의수준에 도달한 경우에 한정하도록 하였다. 또한, 과거의 순환 및 확산 모델링의 문제점을 개선하기 위한 대안으로서 표준코드의 개발을 제안하였다. The methods of physical oceanographic surveys to examine the effect of thermal discharge from nuclear power plants in Korea have been reviewed and a standard guide to the survey is proposed. It is desirable that in situ observation and numerical thermal diffusion modeling are conducted simultaneously to describe the variation in temperature distribution affected by thermal discharge from a power plant because any observation or numerical modeling alone has limits to do so quantitatively. It is suggested that the field observation must be based on the concept of heat budget modeling considering all artificial and natural heat sources/sinks around the power plant. Any results from numerical modeling must reach to a certain statistical significance level to use for a standard temperature distribution. In addition, the development of standard numerical codes is proposed to improve the problems shown in the past numerical circulation and diffusion modelling.
이재학,유중돈,Lee, Jae-Hak,Yoo, Choong-Don 대한용접접합학회 2009 대한용접·접합학회지 Vol.27 No.1
In order to determine the One-Drop One-Pulse(ODOP) condition of the pulsed gas metal arc(GMA) welding, the drop detaching phenomenon during the peak time is investigated using the force-displacement model. The drop detaching criterion is established based on the displacement of the pendant drop, and the forces exerted on the drop are calculated using the Modified Force Balance Model(MFBM). The effects of wire melting on the drop size and force are included in the force-displacement model. While the peak current has most significant effects on the drop detaching time, the initial drop mass prior to the peak time also influences drop transfer. The calculated results show good agreements with the experimental data, which implies that the ODOP condition can be predicted using the force-displacement method.